YOU SAID:

i Like to pet the dog who is a good boy.

INTO JAPANESE

私は良い子である犬を撫でるのが好きです。

BACK INTO ENGLISH

I like to pet dogs who are good kids.

INTO JAPANESE

私は良い子の犬を撫でるのが好きです。

BACK INTO ENGLISH

I like petting good dogs.

INTO JAPANESE

私は良い犬を撫でるのが好きです。

BACK INTO ENGLISH

I like petting a good dog.

INTO JAPANESE

私は良い犬を撫でるのが好きです。

BACK INTO ENGLISH

I like petting a good dog.